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We discuss Linux, FreeBSD and macOS separately, and we even go as far as splitting Linux distros into short-lifetime and long-lifetime, when ultimately the same two priciples apply everywhere: we don't want to support a platform longer than its vendor does, and in cases where the vendor support is extremely long we need to have a time-based escape hatch. Signed-off-by: Andrea Bolognani <abologna@redhat.com> Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
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82 lines
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========================
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Supported host platforms
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========================
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.. contents::
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Libvirt aims to support building and executing on multiple host OS platforms,
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as well as working with multiple hypervisors. This document outlines which
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platforms are targeted for each of these areas.
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Build targets
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=============
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These platforms are used as the basis for deciding upon the minimum required
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versions of 3rd party software libvirt depends on. If a platform is not listed
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here, it does not imply that libvirt won't work. If an unlisted platform has
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comparable software versions to a listed platform, there is every expectation
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that it will work. Bug reports are welcome for problems encountered on
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unlisted platforms unless they are clearly older vintage than what is described
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here.
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Note that when considering software versions shipped in distros as support
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targets, libvirt considers only the version number, and assumes the features in
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that distro match the upstream release with the same version. In other words,
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if a distro backports extra features to the software in their distro, libvirt
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upstream code will not add explicit support for those backports, unless the
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feature is auto-detectable in a manner that works for the upstream releases
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too.
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The `Repology`_ site is a useful resource to identify currently shipped
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versions of software in various operating systems, though it does not cover all
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distros listed below.
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* `libvirt on Repology`_
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* `qemu on Repology`_
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* `qemu-kvm on Repology`_
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Linux, FreeBSD and macOS
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------------------------
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The project aims to support the most recent major version at all times. Support
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for the previous major version will be dropped 2 years after the new major
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version is released or when the vendor itself drops support, whichever comes
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first.
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For the purposes of identifying supported software versions available on Linux,
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the project will look at CentOS, Debian, Fedora, openSUSE, RHEL, SLES and
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Ubuntu LTS. Other distros will be assumed to ship similar software versions.
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For FreeBSD, decisions will be made based on the contents of the ports tree;
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for macOS, `HomeBrew`_ will be used, although `MacPorts`_ is expected to carry
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similar versions.
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Windows
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-------
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The project supports building with current versions of the MinGW toolchain,
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hosted on Linux.
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Virtualization platforms
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========================
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For `hypervisor drivers`_ which execute locally (QEMU, LXC, VZ, libxl, etc),
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the set of supported operating system platforms listed above will inform
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choices as to the minimum required versions of 3rd party libraries and
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hypervisor management APIs.
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If a hypervisor is not commonly shipped directly by any distro listed above,
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(VMware ESX, HyperV, VZ), the project aims to support versions up to 5 years,
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or until the vendor discontinues support, whichever comes first.
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.. _HomeBrew: https://brew.sh/
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.. _MacPorts: https://www.macports.org/
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.. _Repology: https://repology.org/
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.. _hypervisor drivers: drivers.html
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.. _libvirt on Repology: https://repology.org/metapackage/libvirt/versions
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.. _qemu on Repology: https://repology.org/metapackage/qemu/versions
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.. _qemu-kvm on Repology: https://repology.org/metapackage/qemu-kvm/versions
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